PLATE XVI, 
FIG. IL. 
NERITA PALLIDULUS. 
PALE NERIT. 
GENERIC CHARACTER. 
Globose. Aperture semiorbicular. 
SPECIFIC CHARACTER 
Semitransparent. Wreaths rather prominent. Mouth semilunar, 
very patulous. Umbilicus large. 
Nerita Corneus, spira paululum exserta. Pallidulus Da Costa. p. 51. 
Sp. 29. 
Da Costa says ‘‘ This species is rare, for I have only received 
some few shells from the coasts of Kent and Dorset.’? Healso con- 
siders it an undescribed shell. 
